• Quartz.NET 实现定时任务调度


    Quartz.NET Quick Start Guide

    Welcome to the Quick Start Guide for Quartz.NET. As you read this guide, expect to see details of:

    • Downloading Quartz.NET
    • Installing Quartz.NET
    • Configuring Quartz to your own particular needs
    • Starting a sample application

    Download and Install

    You can either download the zip file or use the NuGet package. NuGet package contains only the binaries needed to run Quartz.NET, zip file comes with source code, samples and Quartz.NET server sample application.

    Zip Archive

    Short version: Once you’ve downloaded Quartz.NET, unzip it somewhere, grab the Quartz.dll from bin directory and start to use it.

    Quartz core library does not have any hard binary dependencies. You can opt-in to more dependencies when you choose to use JSON serialization package, which requires JSON.NET. You need to have at least Quartz.dll beside your app binaries to successfully run Quartz.NET. So just add it as a references to your Visual Studio project that uses them. You can find these dlls from extracted archive from path binyour-target-framework-version eleaseQuartz.

    NuGet Package

    Couldn’t get any simpler than this. Just fire up Visual Studio (with NuGet installed) and add reference to package Quartz from package manager extension:

    • Right-click on your project’s References and choose Manage NuGet Packages…
    • Choose Online category from the left
    • Enter Quartz to the top right search and hit enter
    • Choose Quartz.NET from search results and hit install
    • Done!

    or from NuGet Command-Line:

    Install-Package Quartz
    

    If you want to add JSON Serialization, just add the Quartz.Serialization.Json package the same way.

    Configuration

    This is the big bit! Quartz.NET is a very configurable library. There are three ways (which are not mutually exclusive) to supply Quartz.NET configuration information:

    • Programmatically via providing NameValueCollection parameter to scheduler factory
    • Via standard youapp.exe.config configuration file using quartz-element (full .NET framework only)
    • quartz.config file in your application’s root directory (works both with .NET Core and full .NET Framework)

    You can find samples of all these alternatives in the Quartz.NET zip file.

    Full documentation of available properties is available in the Quartz Configuration Reference.

    To get up and running quickly, a basic quartz.config looks something like this:

    quartz.scheduler.instanceName = MyScheduler
    quartz.jobStore.type = Quartz.Simpl.RAMJobStore, Quartz
    quartz.threadPool.threadCount = 3
    

    Remember to set the Copy to Output Directory on Visual Studio’s file property pages to have value Copy always. Otherwise the config will not be seen if it’s not in build directory.

    The scheduler created by this configuration has the following characteristics:

    • quartz.scheduler.instanceName - This scheduler’s name will be “MyScheduler”.
    • quartz.threadPool.threadCount - Maximum of 3 jobs can be run simultaneously.
    • quartz.jobStore.type - All of Quartz’s data, such as details of jobs and triggers, is held in memory (rather than in a database). Even if you have a database and want to use it with Quartz, I suggest you get Quartz working with the RamJobStore before you open up a whole new dimension by working with a database.

    Actually you don’t need to define these properties if you don’t want to, Quartz.NET comes with sane defaults

    Starting a Sample Application

    Now you’ve downloaded and installed Quartz, it’s time to get a sample application up and running. The following code obtains an instance of the scheduler, starts it, then shuts it down:

    Program.cs

    using System;
    using System.Threading.Tasks;
    
    using Quartz;
    using Quartz.Impl;
    
    namespace QuartzSampleApp
    {
        public class Program
        {
            private static void Main(string[] args)
            {
                // trigger async evaluation
                RunProgram().GetAwaiter().GetResult();
            }
    
            private static async Task RunProgram()
            {
                try
                {
                    // Grab the Scheduler instance from the Factory
                    NameValueCollection props = new NameValueCollection
                    {
                        { "quartz.serializer.type", "binary" }
                    };
                    StdSchedulerFactory factory = new StdSchedulerFactory(props);
                    IScheduler scheduler = await factory.GetScheduler();
    
                    // and start it off
                    await scheduler.Start();
    
                    // some sleep to show what's happening
                    await Task.Delay(TimeSpan.FromSeconds(60));
    
                    // and last shut down the scheduler when you are ready to close your program
                    await scheduler.Shutdown();
                }
                catch (SchedulerException se)
                {
                    await Console.Error.WriteLineAsync(se.ToString());
                }
            }
        }
    }
    

    Once you obtain a scheduler using StdSchedulerFactory.GetDefaultScheduler(), your application will not terminate by default until you call scheduler.Shutdown(), because there will be active threads (non-daemon threads).

    No running the program will not show anything. When 10 seconds have passed the program will just terminate. Lets add some logging to console.

    Adding logging

    LibLog can be configured to use different logging frameworks under the hood; namely Log4Net, NLog and Serilog.

    When LibLog does not detect any other logging framework to be present, it will be silent. We can configure a custom logger provider that just logs to console show the output if you don’t have logging framework setup ready yet.

    LogProvider.SetCurrentLogProvider(new ConsoleLogProvider());
    
    private class ConsoleLogProvider : ILogProvider
    {
        public Logger GetLogger(string name)
        {
            return (level, func, exception, parameters) =>
            {
                if (level >= LogLevel.Info && func != null)
                {
                    Console.WriteLine("[" + DateTime.Now.ToLongTimeString() + "] [" + level + "] " + func(), parameters);
                }
                return true;
            };
        }
    
        public IDisposable OpenNestedContext(string message)
        {
            throw new NotImplementedException();
        }
    
        public IDisposable OpenMappedContext(string key, string value)
        {
            throw new NotImplementedException();
        }
    }
    

    Trying out the application and adding jobs

    No we should get a lot more information when we start the application.

    [12.51.10] [Info] Quartz.NET properties loaded from configuration file 'C:QuartzSampleAppquartz.config'
    [12.51.10] [Info] Initialized Scheduler Signaller of type: Quartz.Core.SchedulerSignalerImpl
    [12.51.10] [Info] Quartz Scheduler v.0.0.0.0 created.
    [12.51.10] [Info] RAMJobStore initialized.
    [12.51.10] [Info] Scheduler meta-data: Quartz Scheduler (v0.0.0.0) 'MyScheduler' with instanceId 'NON_CLUSTERED'
      Scheduler class: 'Quartz.Core.QuartzScheduler' - running locally.
      NOT STARTED.
      Currently in standby mode.
      Number of jobs executed: 0
      Using thread pool 'Quartz.Simpl.DefaultThreadPool' - with 3 threads.
      Using job-store 'Quartz.Simpl.RAMJobStore' - which does not support persistence. and is not clustered.
    
    [12.51.10] [Info] Quartz scheduler 'MyScheduler' initialized
    [12.51.10] [Info] Quartz scheduler version: 0.0.0.0
    [12.51.10] [Info] Scheduler MyScheduler_$_NON_CLUSTERED started.
    

    We need a simple test job to test the functionality, lets create HelloJob that outputs greetings to console.

    public class HelloJob : IJob
    {
    	public Task Execute(IJobExecutionContext context)
    	{
    		await Console.Out.WriteLineAsync("Greetings from HelloJob!");
    	}
    }
    

    To do something interesting, you need code just after Start() method, before the Task.Delay.

    // define the job and tie it to our HelloJob class
    IJobDetail job = JobBuilder.Create<HelloJob>()
    	.WithIdentity("job1", "group1")
    	.Build();
    
    // Trigger the job to run now, and then repeat every 10 seconds
    ITrigger trigger = TriggerBuilder.Create()
    	.WithIdentity("trigger1", "group1")
    	.StartNow()
    	.WithSimpleSchedule(x => x
    		.WithIntervalInSeconds(10)
    		.RepeatForever())
    	.Build();
    
    // Tell quartz to schedule the job using our trigger
    await scheduler.ScheduleJob(job, trigger);
    

    The complete console application will now look like this

    using System;
    using System.Threading.Tasks;
    
    using Quartz;
    using Quartz.Impl;
    using Quartz.Logging;
    
    namespace QuartzSampleApp
    {
        public class Program
        {
            private static void Main(string[] args)
            {
                LogProvider.SetCurrentLogProvider(new ConsoleLogProvider());
    
                RunProgramRunExample().GetAwaiter().GetResult();
    
                Console.WriteLine("Press any key to close the application");
                Console.ReadKey();
            }
    
            private static async Task RunProgramRunExample()
            {
                try
                {
                    // Grab the Scheduler instance from the Factory
                    NameValueCollection props = new NameValueCollection
                    {
                        { "quartz.serializer.type", "binary" }
                    };
                    StdSchedulerFactory factory = new StdSchedulerFactory(props);
                    IScheduler scheduler = await factory.GetScheduler();
    
                    // and start it off
                    await scheduler.Start();
    
                    // define the job and tie it to our HelloJob class
                    IJobDetail job = JobBuilder.Create<HelloJob>()
                        .WithIdentity("job1", "group1")
                        .Build();
    
                    // Trigger the job to run now, and then repeat every 10 seconds
                    ITrigger trigger = TriggerBuilder.Create()
                        .WithIdentity("trigger1", "group1")
                        .StartNow()
                        .WithSimpleSchedule(x => x
                            .WithIntervalInSeconds(10)
                            .RepeatForever())
                        .Build();
    
                    // Tell quartz to schedule the job using our trigger
                    await scheduler.ScheduleJob(job, trigger);
    
                    // some sleep to show what's happening
                    await Task.Delay(TimeSpan.FromSeconds(60));
    
                    // and last shut down the scheduler when you are ready to close your program
                    await scheduler.Shutdown();
                }
                catch (SchedulerException se)
                {
                    Console.WriteLine(se);
                }
            }
    
            // simple log provider to get something to the console
            private class ConsoleLogProvider : ILogProvider
            {
                public Logger GetLogger(string name)
                {
                    return (level, func, exception, parameters) =>
                    {
                        if (level >= LogLevel.Info && func != null)
                        {
                            Console.WriteLine("[" + DateTime.Now.ToLongTimeString() + "] [" + level + "] " + func(), parameters);
                        }
                        return true;
                    };
                }
    
                public IDisposable OpenNestedContext(string message)
                {
                    throw new NotImplementedException();
                }
    
                public IDisposable OpenMappedContext(string key, string value)
                {
                    throw new NotImplementedException();
                }
            }
        }
    
        public class HelloJob : IJob
        {
            public async Task Execute(IJobExecutionContext context)
            {
                await Console.Out.WriteLineAsync("Greetings from HelloJob!");
            }
        }
    }
    

    Now go have some fun exploring Quartz.NET! You can continue by reading the tutorial.

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  • 原文地址:https://www.cnblogs.com/dearbeans/p/7660495.html
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